Still injecting in the same spot every time? Read this. Where you inject your peptides can actually affect absorption, comfort, and results. Quick guide: Abdomen: fastest absorption Upper arms GHK Cu Copper Peptide Serum Private Label Skin Repair GHK cu Face Serum Super Peptide Serum Anti Aging Facial Oil with Copper Tripeptides for Plumping and Firming with Witch Hazel GHK Cu Injectable Team Wellcore Copper Peptides Elmhurst IL Chicago Accelerated Aesthetics Biossance Squalane + Copper Peptide Rapid Plumping Serum